University of Maryland Extension

Slowing Dewormer Resistance

Author: 
Susan Schoenian

Dewormer resistance is inevitable, but the rate at which it develops is not.

It is a well-known fact that gastro-intestinal parasites (worms) have developed resistance to all of the currently available dewormers (anthelmintics) [1,2,8]. Resistance means that  an anthelmintic treatment is not effective (or only marginally effective) at killing worms and alleviating clinical symptoms. Worm resistance is heritable; the worm's ability to survive is ... more ››

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